<template>
  <div>
    <h2>我是About的内容</h2>
  </div>
</template>

<script>
export default {
   name:'About',
   mounted(){
    console.log('About启动了')
   },
   beforeDestroy(){
    console.log('About要销毁了')
   }
}
</script>

<style>

</style>